It can be applied at meeting room, conference room, museum, gallery, th eatre, concert hall, church, temple, restaurant, classroom, training center, factory, bank, train, bus, etc. For some locations of special purpose such as hospital, gas station, etc., please do field test first to make sure no interference happened to th e normal operation of th eir equipment and instrument..*.It' easy to install and operate th e device. No adjustment is needed*.If not well paralyze happened, please change th e installation location or position or to check if any cellular control stations or repeaters installed just in nearby .